Mesomorphs, in particular, are known for their athletic build, with broad shoulders, narrow waists, and a natural propensity for muscle growth ... by their lean frames and they often struggle ...

Their approach seems to be working in the muscle-building department ... For example, a 160-pound man should consume around 160 grams of protein a day—the amount he’d get from an 8-ounce ...

The UK National Diet and Nutrition Survey reveals that the average amount of protein eaten by a 19-64-year-old man is 87.4g ... on the best way to build muscle and look lean.

This amino acid is known for its muscle-building prowess. If you already have enough fat in your diet but need to boost your protein intake, look no further than fish. It's one of the best lean ...